The Tor Browser: other-licenses/7zstub/src/Windows/FileIO.cpp@b8a032363ba2 (annotated)

other-licenses/7zstub/src/Windows/FileIO.cpp@b8a032363ba2 (annotated)

other-licenses/7zstub/src/Windows/FileIO.cpp

Thu, 22 Jan 2015 13:21:57 +0100

author: Michael Schloh von Bennewitz <michael@schloh.com>
date: Thu, 22 Jan 2015 13:21:57 +0100
branch: TOR_BUG_9701
changeset 15: b8a032363ba2
permissions: -rw-r--r--

Incorporate requested changes from Mozilla in review:
https://bugzilla.mozilla.org/show_bug.cgi?id=1123480#c6

 // Windows/FileIO.cpp
 #include "StdAfx.h"
 #include "FileIO.h"
 #include "Defs.h"
 #ifndef _UNICODE
 #include "../Common/StringConvert.h"
 #endif
 #ifndef _UNICODE
 extern bool g_IsNT;
 #endif
 namespace NWindows {
 namespace NFile {
 namespace NIO {
 CFileBase::~CFileBase() { Close(); }
 bool CFileBase::Create(LPCTSTR fileName, DWORD desiredAccess,
     DWORD shareMode, DWORD creationDisposition, DWORD flagsAndAttributes)
 {
   Close();
   _handle = ::CreateFile(fileName, desiredAccess, shareMode,
       (LPSECURITY_ATTRIBUTES)NULL, creationDisposition,
       flagsAndAttributes, (HANDLE) NULL);
   return (_fileIsOpen = (_handle != INVALID_HANDLE_VALUE));
 }
 #ifndef _UNICODE
 bool CFileBase::Create(LPCWSTR fileName, DWORD desiredAccess,
     DWORD shareMode, DWORD creationDisposition, DWORD flagsAndAttributes)
 {
   if (g_IsNT)
   {
     Close();
     _handle = ::CreateFileW(fileName, desiredAccess, shareMode,
       (LPSECURITY_ATTRIBUTES)NULL, creationDisposition,
       flagsAndAttributes, (HANDLE) NULL);
     return (_fileIsOpen = (_handle != INVALID_HANDLE_VALUE));
   }
   return Create(UnicodeStringToMultiByte(fileName, ::AreFileApisANSI() ? CP_ACP : CP_OEMCP),
     desiredAccess, shareMode, creationDisposition, flagsAndAttributes);
 }
 #endif
 bool CFileBase::Close()
 {
   if(!_fileIsOpen)
     return true;
   bool result = BOOLToBool(::CloseHandle(_handle));
   _fileIsOpen = !result;
   return result;
 }
 bool CFileBase::GetPosition(UInt64 &position) const
 {
   return Seek(0, FILE_CURRENT, position);
 }
 bool CFileBase::GetLength(UInt64 &length) const
 {
   DWORD sizeHigh;
   DWORD sizeLow = ::GetFileSize(_handle, &sizeHigh);
   if(sizeLow == 0xFFFFFFFF)
     if(::GetLastError() != NO_ERROR)
       return false;
   length = (((UInt64)sizeHigh) << 32) + sizeLow;
   return true;
 }
 bool CFileBase::Seek(Int64 distanceToMove, DWORD moveMethod, UInt64 &newPosition) const
 {
   LARGE_INTEGER value;
   value.QuadPart = distanceToMove;
   value.LowPart = ::SetFilePointer(_handle, value.LowPart, &value.HighPart, moveMethod);
   if (value.LowPart == 0xFFFFFFFF)
     if(::GetLastError() != NO_ERROR)
       return false;
   newPosition = value.QuadPart;
   return true;
 }
 bool CFileBase::Seek(UInt64 position, UInt64 &newPosition)
 {
   return Seek(position, FILE_BEGIN, newPosition);
 }
 bool CFileBase::SeekToBegin()
 {
   UInt64 newPosition;
   return Seek(0, newPosition);
 }
 bool CFileBase::SeekToEnd(UInt64 &newPosition)
 {
   return Seek(0, FILE_END, newPosition);
 }
 bool CFileBase::GetFileInformation(CByHandleFileInfo &fileInfo) const
 {
   BY_HANDLE_FILE_INFORMATION winFileInfo;
   if(!::GetFileInformationByHandle(_handle, &winFileInfo))
     return false;
   fileInfo.Attributes = winFileInfo.dwFileAttributes;
   fileInfo.CreationTime = winFileInfo.ftCreationTime;
   fileInfo.LastAccessTime = winFileInfo.ftLastAccessTime;
   fileInfo.LastWriteTime = winFileInfo.ftLastWriteTime;
   fileInfo.VolumeSerialNumber = winFileInfo.dwFileAttributes;
   fileInfo.Size = (((UInt64)winFileInfo.nFileSizeHigh) << 32) +  winFileInfo.nFileSizeLow;
   fileInfo.NumberOfLinks = winFileInfo.nNumberOfLinks;
   fileInfo.FileIndex = (((UInt64)winFileInfo.nFileIndexHigh) << 32) + winFileInfo.nFileIndexLow;
   return true;
 }
 /////////////////////////
 // CInFile
 bool CInFile::Open(LPCTSTR fileName, DWORD shareMode, DWORD creationDisposition, DWORD flagsAndAttributes)
   { return Create(fileName, GENERIC_READ, shareMode, creationDisposition, flagsAndAttributes); }
 bool CInFile::Open(LPCTSTR fileName)
   { return Open(fileName, FILE_SHARE_READ, OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL); }
 #ifndef _UNICODE
 bool CInFile::Open(LPCWSTR fileName, DWORD shareMode, DWORD creationDisposition, DWORD flagsAndAttributes)
   { return Create(fileName, GENERIC_READ, shareMode, creationDisposition, flagsAndAttributes); }
 bool CInFile::Open(LPCWSTR fileName)
   { return Open(fileName, FILE_SHARE_READ, OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL); }
 #endif
 // ReadFile and WriteFile functions in Windows have BUG:
 // If you Read or Write 64MB or more (probably min_failure_size = 64MB - 32KB + 1)
 // from/to Network file, it returns ERROR_NO_SYSTEM_RESOURCES
 // (Insufficient system resources exist to complete the requested service).
 static UInt32 kChunkSizeMax = (1 << 24);
 bool CInFile::ReadPart(void *data, UInt32 size, UInt32 &processedSize)
 {
   if (size > kChunkSizeMax)
     size = kChunkSizeMax;
   DWORD processedLoc = 0;
   bool res = BOOLToBool(::ReadFile(_handle, data, size, &processedLoc, NULL));
   processedSize = (UInt32)processedLoc;
   return res;
 }
 bool CInFile::Read(void *data, UInt32 size, UInt32 &processedSize)
 {
   processedSize = 0;
   do
   {
     UInt32 processedLoc = 0;
     bool res = ReadPart(data, size, processedLoc);
     processedSize += processedLoc;
     if (!res)
       return false;
     if (processedLoc == 0)
       return true;
     data = (void *)((unsigned char *)data + processedLoc);
     size -= processedLoc;
   }
   while (size > 0);
   return true;
 }
 /////////////////////////
 // COutFile
 bool COutFile::Open(LPCTSTR fileName, DWORD shareMode, DWORD creationDisposition, DWORD flagsAndAttributes)
   { return CFileBase::Create(fileName, GENERIC_WRITE, shareMode, creationDisposition, flagsAndAttributes); }
 static inline DWORD GetCreationDisposition(bool createAlways)
   { return createAlways? CREATE_ALWAYS: CREATE_NEW; }
 bool COutFile::Open(LPCTSTR fileName, DWORD creationDisposition)
   { return Open(fileName, FILE_SHARE_READ, creationDisposition, FILE_ATTRIBUTE_NORMAL); }
 bool COutFile::Create(LPCTSTR fileName, bool createAlways)
   { return Open(fileName, GetCreationDisposition(createAlways)); }
 #ifndef _UNICODE
 bool COutFile::Open(LPCWSTR fileName, DWORD shareMode, DWORD creationDisposition, DWORD flagsAndAttributes)
   { return CFileBase::Create(fileName, GENERIC_WRITE, shareMode,      creationDisposition, flagsAndAttributes); }
 bool COutFile::Open(LPCWSTR fileName, DWORD creationDisposition)
   { return Open(fileName, FILE_SHARE_READ,  creationDisposition, FILE_ATTRIBUTE_NORMAL); }
 bool COutFile::Create(LPCWSTR fileName, bool createAlways)
   { return Open(fileName, GetCreationDisposition(createAlways)); }
 #endif
 bool COutFile::SetTime(const FILETIME *creationTime, const FILETIME *lastAccessTime, const FILETIME *lastWriteTime)
   { return BOOLToBool(::SetFileTime(_handle, creationTime, lastAccessTime, lastWriteTime)); }
 bool COutFile::SetLastWriteTime(const FILETIME *lastWriteTime)
   {  return SetTime(NULL, NULL, lastWriteTime); }
 bool COutFile::WritePart(const void *data, UInt32 size, UInt32 &processedSize)
 {
   if (size > kChunkSizeMax)
     size = kChunkSizeMax;
   DWORD processedLoc = 0;
   bool res = BOOLToBool(::WriteFile(_handle, data, size, &processedLoc, NULL));
   processedSize = (UInt32)processedLoc;
   return res;
 }
 bool COutFile::Write(const void *data, UInt32 size, UInt32 &processedSize)
 {
   processedSize = 0;
   do
   {
     UInt32 processedLoc = 0;
     bool res = WritePart(data, size, processedLoc);
     processedSize += processedLoc;
     if (!res)
       return false;
     if (processedLoc == 0)
       return true;
     data = (const void *)((const unsigned char *)data + processedLoc);
     size -= processedLoc;
   }
   while (size > 0);
   return true;
 }
 bool COutFile::SetEndOfFile() { return BOOLToBool(::SetEndOfFile(_handle)); }
 bool COutFile::SetLength(UInt64 length)
 {
   UInt64 newPosition;
   if(!Seek(length, newPosition))
     return false;
   if(newPosition != length)
     return false;
   return SetEndOfFile();
 }
 }}}

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other-licenses/7zstub/src/Windows/FileIO.cpp@b8a032363ba2 (annotated)

other-licenses/7zstub/src/Windows/FileIO.cpp